Final answer:
The "firm league of friendship" of states is a phrase used to describe the relationship among the states as outlined in the Articles of Confederation, the first constitution of the United States.
Step-by-step explanation:
The correct answer is B. Articles of Confederation. The "firm league of friendship" of states is a phrase used to describe the relationship among the states as outlined in the Articles of Confederation. The Articles of Confederation, adopted in 1781, were the first constitution of the United States and established a weak central government with most powers held by the individual states. This arrangement emphasized the idea of cooperation and friendship among the states while maintaining a certain level of independence.
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